Question

2. Which of the following statements is true?
(a) A convex lens has 4 dioptre power having a focal length 0.25 m.
b) A convex lens has 4 dioptre power having a focal length 0.25 m.
c) A concave lens has 4 dioptre power having a focal length 0.25 m.
d)A concave lens has 4 dioptre power having a focal length 0.25 m.​

Answer 1

Answer:

d) this is a right and true statement

Answer 2

Answer:

for ur kind information u have mistakes in questio

there are two statements which are correct:

1. the convex lens of power 4 dioptre have 0.25m focal length
2. the concave lens of power 4 dioptre have -0.25 m focal length
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